The Pöyry story began in 1958 when over the course of one night Dr Jaakko Pöyry agreed to do the basic engineering for the Äänekoski sulphate pulp mill in Finland. From that night on Pöyry grew. First to Sweden and the other Nordic countries followed by Europe, the Americas and eventually to the rest of the world. By its tenth anniversary, the company had produced nearly 10 000 drawings and had a staff of more than 100. And by its twentieth anniversary the company had produced more than 75 000 drawings and had a staff of more than 1000.

As the company grew the culture did too. But what set Pöyry apart already in the early years was integrity. Clients could always count on Pöyry engineers and consultants for advice. The advice was honest and straightforward - always the best, most thought out advice available.